JPH01135434U - - Google Patents
Info
- Publication number
- JPH01135434U JPH01135434U JP2977688U JP2977688U JPH01135434U JP H01135434 U JPH01135434 U JP H01135434U JP 2977688 U JP2977688 U JP 2977688U JP 2977688 U JP2977688 U JP 2977688U JP H01135434 U JPH01135434 U JP H01135434U
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- projection lens
- infrared light
- screen surface
- reflected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 1
Landscapes
- Focusing (AREA)
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2977688U JPH01135434U (it) | 1988-03-08 | 1988-03-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2977688U JPH01135434U (it) | 1988-03-08 | 1988-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01135434U true JPH01135434U (it) | 1989-09-18 |
Family
ID=31254278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2977688U Pending JPH01135434U (it) | 1988-03-08 | 1988-03-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01135434U (it) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03257443A (ja) * | 1990-03-08 | 1991-11-15 | Canon Inc | 画像投影装置 |
| JPH0424740U (it) * | 1990-06-19 | 1992-02-27 |
-
1988
- 1988-03-08 JP JP2977688U patent/JPH01135434U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03257443A (ja) * | 1990-03-08 | 1991-11-15 | Canon Inc | 画像投影装置 |
| JPH0424740U (it) * | 1990-06-19 | 1992-02-27 |